I'm just a bit confused by the massive amounts of gamerscore that those achievements are weighted for. It seems like if they DO make it into an actual full release to us, they'll be toned down to the 5 GS points like they normally were weighted for the MP achievements in original Halo 3.
Either way, Disgruntled is correct, Bungie may have some explaining to do.

It will be interesting to see how this develops. Where were these screenies of these achievements taken from? PAX? 750 points does seem a bit much as I thought Microsoft had strict rules for extra achievements totaling no more than 250 points.

Wow, you know I was thrown off by the amount of points but I think you're right. I think I heard that you're allowed 250 pts per pack, do you have the source for this MasterChief?

Well if you look at some of the achievements there some say "on a Legendary map", I'm betting others will say "on a Heroic map" and then the others for Mythic (the skulls achievements, etc). And yeah Microsoft's rule is 250pts optional achievements for DLC

Well if you look at some of the achievements there some say "on a Legendary map", I'm betting others will say "on a Heroic map" and then the others for Mythic (the skulls achievements, etc). And yeah Microsoft's rule is 250pts optional achievements for DLC

Yeah, but where are those DLC guidelines listed? I'm hearing different things from different sources such as below.

A strong word of caution:

Microsoft's official guidelines for DLC achievements are:

1) Games may add up to 10 additional Achievements through DLC
2) The additional Achievements may add up to a maximum of 250 Gamerscore

There are way more than 10, and the points add up to way more than 250 Gamerscore.

I wouldn't get too excited if I were you. It's probably a development build with all kinds of stuff in there.

Yeah, but where are those DLC guidelines listed? I'm hearing different things from different sources such as below.

That quote confirms what I've said, 250gamerscore per DLC pack (250 for Mythic, 250 for Legendary, 250 for Heroic, they are all separate DLC). 10 achievements max too, which means 10 max for Heroic, 10 max for Legendary, and 10 max for Mythic. If you count, there are 30 new achievements.

IMPORTANT: The following achievements reveal the names of the new maps supporting the theory of a new Foundry that was shown in the Award Acceptance Videos from Bungie.

Heretic Skull
25gs

Citadel Skull
25gs

Assembly Skull
25gs

Sandbox Skull
25gs

Orbital Skull
25gs

Longshore Skull
25g

Assembly was confirmed to be the name for the new covenant map revealed at PAX....... Sandbox seems to be the ideal name for what was hinted at during the Award Acceptance Videos....... all i can say is that this map pack will be AWESOME!!!

IMPORTANT: The following achievements reveal the names of the new maps supporting the theory of a new Foundry that was shown in the Award Acceptance Videos from Bungie.

Heretic Skull
25gs

Citadel Skull
25gs

Assembly Skull
25gs

Sandbox Skull
25gs

Orbital Skull
25gs

Longshore Skull
25g

Assembly was confirmed to be the name for the new covenant map revealed at PAX....... Sandbox seems to be the ideal name for what was hinted at during the Award Acceptance Videos....... all i can say is that this map pack will be AWESOME!!!

That quote confirms what I've said, 250gamerscore per DLC pack (250 for Mythic, 250 for Legendary, 250 for Heroic, they are all separate DLC). 10 achievements max too, which means 10 max for Heroic, 10 max for Legendary, and 10 max for Mythic. If you count, there are 30 new achievements.

2. Game publishers will have the option to deliver another 250 incremental Gamerscore on top of the 1,000 via add-on content from Marketplace. This add-on content could be either free or paid. So if you complete a game and earn the full 1,000 GS, you could by getting new add-on content earn up to a total of 1,250 points from a game.

Emphasis mine. Microsoft guidelines state that a game can have at MOST 1250 points. These new achievements are almost assuredly fake. It would not be difficult, at all, to fake those screens.